i think there's a few classifications of rare. there's the hard numbers type such as: they only made x amount of 67 formula s 383 cars. but from there you get the break outs of color and options, which is interesting.
then there's the weirdos: some one off 4dr 4spd with at romper stomper motor and suspension package. which i dig.
what bores me to death is the incessant breakdown of granular detail options to make some plain jane bread and butter car into a "1 of 6 ever made!!". i mean, it's interesting that somebody rolled into a dealer and ordered a 6/ 3 on the floor car with every goo-gah option box ticked. but that just doesn't get me going.